Python AI中的错误

我目前正在用Python编写一个人工智能程序，其中包含一些来自ELIZA的基本代码。我将改进代码，一旦我得到它的工作。我的问题是，当我运行程序并向计算机输入查询时，没有响应。我的代码如下

import string

# OSWALD v1.0

switch = [
["I need \(.*\)",
[   "Why do you need %1?",
    "Would it REALLY help you to get %1?",
    "Are you sure you need %1?"]]
 #There is more code with responses.
   ]

gPats = {
"am"    : "are",
"was"   : "were",
"i" : "you",
"i'd"   : "you would",
"i've"  : "you have",
"i'll"  : "you will",
"my"    : "your",
"are"   : "am",
"you've": "I have",
"you'll": "I will",
"your"  : "my",
    "yours" : "mine",
"you"   : "me",
"me"    : "you",
    }
s = input
gKeys = map(lambda x:regex.compile(x[0]),gPats)
gValues = map(lambda x:x[1],gPats)

print ("Hello, mortal. My name is Oswald. What would you like to talk about?")

while s == input:
try: s = input(">")

def translate(str,dict):
words = string.split(string.lower(str))
keys = dict.keys();
for i in range(0,len(words)):
    if words[i] in keys:
        words[i] = dict[words[i]]
return print(switch)

def respond(str,keys,values):
for i in range(0,len(keys)):
    if input == input:
        respnum = whrandom.randint(0,len(values[word])-1)
        resp = values[i][respnum]
        pos = string.find(resp,'%')
        print(string.find(resp,'%'))
        while pos > -1:
            num = string.atoi(resp[pos+1:pos+2])
            resp = resp[:pos] + \
                translate(keys[i].group(num),gReflections) + \
                resp[pos+2:]
            pos = string.find(resp,'%')
        if resp[-2:] == '?.': resp = resp[:-2] + '.'
        if resp[-2:] == '??': resp = resp[:-2] + '?'
        print(string.find(resp,'%'))

---

如果我是你，我想知道示例中的所有代码是否都是严格必需的……好的。谢谢。很抱歉。你知道哪里有问题吗？是的，你可能想阅读这篇文章并编辑你的问题。谢谢。这是我的第一篇博文，我感谢你们的帮助。乍一看：可能不必是

input==input

，但

input==input（）

？